Double-sided printing equipment

Abstract

The present invention discloses a double-sided printing device, including a shell and a paper storage box, wherein a support rod is symmetrically arranged inside the shell, two groups of T-shaped blocks are correspondingly slidably arranged on the support rod, the opposite ends of the two groups of T-shaped blocks are rotatably matched with square rods, an adjustment mechanism is arranged on the square rod, a receiving plate is rotatably connected to the square rod through the adjustment mechanism, a rotating mechanism for driving the square rod to flip is arranged on the support rod, a first driving device for driving the T-shaped block to slide relative to the support rod is arranged at the end of the support rod, a feed port and a discharge port are arranged at the opposite ends of the shell, and the paper storage box is arranged at the end of the feed port of the shell. The beneficial effect of the present invention is that through the coordinated use of the printing assembly, the flipping mechanism, the adjustment mechanism and the conveying mechanism, the front and back sides of the paper are printed by using one printing assembly, thereby avoiding the problem that the existing single printing assembly can only print odd and even pages separately, so that the printing has continuity.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, in particular to a double-sided printing equipment. Background Art

[0002] Printing is divided into single-sided printing and double-sided printing. Double-sided printing refers to printing on both sides (front and back) of the paper in one pass to complete the printing of the printed material. Products such as books, newspapers, etc. contain various graphic information on both sides, and both sides need to be printed.

[0003] Chinese patent publication number CN217170187U discloses a double-sided printing device, including a base, a stand, an ink cartridge, a first printing component, a second printing component and a transmission component; the first printing component includes a first printing head, a first detector arranged on one side of the first printing head, a first telescopic cylinder arranged above the first printing head, and a first dryer arranged on one side of the first telescopic cylinder; the second printing component includes a second printing head, a second detector arranged on one side of the second printing head, a second telescopic cylinder arranged above the second printing head, and a second dryer; after the first detector detects the paper surface to be printed, the first telescopic cylinder lowers the first printing head to print, and then the first dryer dries the printed paper surface, and then transmits the transmission component to the bottom of the second printing head through the transmission component, and the second printing head prints the other side, and then the second dryer dries it, thereby realizing double-sided printing.

[0004] The above-mentioned device uses two sets of printing components to print on the front and back of the paper. In actual use, the two printing components can only print odd and even pages respectively, which is not consistent. Moreover, if the original direction of the paper is not adjusted after it is turned over, the problem of different printing directions on the front and back will occur when printing again, thus affecting the printing effect.

[0005] Therefore, it is necessary to provide a double-sided printing device to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a double-sided printing device to solve the problem in the above-mentioned background technology that printing is not consistent and the direction of the paper cannot be adjusted after turning over.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-sided printing device, comprising a shell and a paper storage box, wherein support rods are symmetrically arranged inside the shell, and two groups of T-shaped blocks are correspondingly slidably arranged on the support rods, and the opposite ends of the two groups of T-shaped blocks are rotatably matched with square rods, and an adjustment mechanism is arranged on the square rod, and a receiving plate is rotatably connected to the square rod through the adjustment mechanism, and a rotating mechanism for driving the square rod to flip is arranged on the support rod, and a first driving device for driving the T-shaped block to slide relative to the support rod is arranged on the end of the support rod, a feed port and a discharge port are arranged at the opposite ends of the shell, and the paper storage box is arranged at the end of the feed port of the shell, a conveying mechanism is arranged in the shell near the discharge port and below the receiving plate, and a printing component is arranged on the top of the inner side wall of the shell corresponding to the receiving plate.

[0008] As a further solution of the present invention: the rotating mechanism includes a rack; the rack is fixedly connected to the side wall of the support rod away from the square rod, and two groups of cylindrical rods are fixedly connected at both ends of the square rod, and a gear ring is arranged on the periphery of one group of the cylindrical rods, and the gear ring is meshed with the rack, and the gear ring is rotatably connected with an L rod close to the side wall of the square rod, and the L rod is slidably embedded in the top of the T-shaped block, and one end of the L rod away from the T-shaped block is slidably matched with a first limit block and a second limit block, the first limit block is arranged on the support rod at a position close to the first driving device, and the second limit block is arranged on the support rod at a position close to the printing component, and the first limit block and the second limit block are arranged opposite to each other, and the inner ring side wall of the gear ring is provided with a protruding portion that slides and fits the inner wall of the cylindrical rod, and a blocking component is arranged in the protruding portion.

[0009] As a further solution of the present invention: the blocking assembly includes a blocking protrusion and a first spring; the blocking protrusion is slidably embedded in the side wall of the protruding part of the gear ring and is symmetrically arranged along its center line, and the first spring is arranged between the two blocking protrusions.

[0010] As a further solution of the present invention: the adjusting mechanism includes a transmission wheel; the transmission wheel is rotatably arranged at the bottom of the square rod, and a hollow column is rotatably arranged at the center of the square rod, and the hollow column is coaxially connected to the receiving plate, and the transmission wheel and the hollow column are connected by belt transmission, and a transmission block cooperating with the transmission wheel is arranged on the side of the support rod opposite to the square rod, and when the transmission wheel moves relative to the paper storage box, it will engage with the transmission block, and drive the receiving plate to rotate half a circle through the hollow column, and a clamping mechanism for clamping and clamping the paper on the receiving plate is arranged on the receiving plate.

[0011] As a further solution of the present invention: the clamping mechanism includes a telescopic rod; a first air channel is opened along the diagonal line in the receiving plate, the telescopic rod is slidably embedded in the first air channel, the end of the telescopic rod away from the receiving plate is fixedly connected to a second L-plate, the second L-plate is opened on the side wall close to the telescopic rod, a connecting slider is slidably arranged in the slide groove, the top of the connecting slider is fixedly connected to a pressure plate, a second spring is arranged between the bottom of the connecting slider and the bottom of the slide groove, the connecting slider is fixedly connected to an oblique block near the middle of the side wall of the telescopic rod, the side wall of the receiving plate is opened with an oblique groove slidably matched with the oblique block, the top of the receiving plate is provided with an unfolding mechanism that cooperates with the pressure plate for stretching paper, and the center of the receiving plate is provided with a driving mechanism for driving the telescopic rod and is connected to the first air channel.

[0012] As a further solution of the present invention: the driving mechanism includes a connecting tube and a pushing assembly; a second air channel is opened at one end of the square rod away from the transmission wheel, a piston is slidably embedded in the second air channel, the first air channel and the second air channel are connected through the connecting tube, and another group of T-shaped blocks is fixedly connected to one end away from the square rod with a pull rope assembly for driving the piston to move relative to the other group of T-shaped blocks, a fixed column is slidably embedded in the side wall of the piston, the pushing assembly is arranged at the end of the square rod close to the T-shaped block and on the side of the square rod close to the first driving device, one end of the fixed column close to the pushing assembly extends into the square rod, and a third spring is arranged between the end of the fixed column away from the pushing assembly and the piston.

[0013] As a further solution of the present invention: the pull rope assembly includes a pull rope and a winding roller; the end of the T-shaped block away from the square rod is fixedly connected to a support plate, the winding roller is rotatably set on the T-shaped block through the support plate, the pull rope is wound around the winding roller, and the end of the pull rope away from the winding roller is rotatably connected to the end of the piston, and a sixth spring is arranged between the end of the piston close to the pull rope assembly and the second air channel.

[0014] As a further solution of the present invention: the pushing assembly includes a horizontal plate and a limiting column; the limiting column is fixedly connected to the side wall of the square rod, and the horizontal plate is slidably mounted on the limiting column. The horizontal plate is provided with a top column near the center of the side wall of the square rod and extends into the side wall of the square rod and slidably cooperates with the fixed column. A baffle plate cooperating with the horizontal plate is provided on the side of the square rod opposite to the pushing assembly, and the end of the baffle plate is fixedly connected to the support rod.

[0015] As a further solution of the present invention: the unfolding mechanism includes a first L-shaped plate and a pushing plate; the first L-shaped plate and the pushing plate are sequentially arranged around the top of the receiving plate. A circular connecting rod that is slidably engaged with the inner wall of the first L-shaped plate is provided at the end of the pushing plate. A fourth spring is arranged between the circular connecting rods inside the first L-shaped plate. Connecting shafts are rotatably connected to both ends of the first L-shaped plate. A U-shaped rod is fixedly connected to the connecting shafts. A scraping plate is slidably embedded in the center of the U-shaped rod. A lifting block is slidably embedded in the side wall of the U-shaped rod and the lifting block penetrates through the scraping plate. A fifth spring is arranged between the top of the scraping plate and the U-shaped rod. The end of the pushing plate is engaged with the connecting shaft. The pushing plate is slidably arranged on the top of the receiving plate.

[0016] As a further solution of the present invention: the conveying mechanism includes a first printing base and a conveyor belt; rotating shafts are传动连接 at both ends of the inner side wall of the conveyor belt. A motor is arranged at one end of the rotating shaft. The first printing base is arranged inside the conveyor belt and is fixedly connected to the support rods at both ends. The two ends of the rotating shaft are rotatably connected to the support rods. The output end of the first driving device is fixedly connected to the T-shaped block.

[0017] Compared with the prior art, the beneficial effects of the present invention are: through the combined use of the printing assembly, the flipping mechanism, the adjusting mechanism and the conveying mechanism, one printing assembly is used to print both sides of the paper, avoiding the problem that the existing separate printing assemblies can only print odd and even pages separately, making the printing coherent. The adjusting mechanism will perform direction adjustment before the flipping mechanism flips the paper, avoiding the problem that the front and back printing directions are different when the paper is printed again after flipping, thereby improving the printing effect. And the pressing assembly presses and clamps the paper to avoid the problem of the paper falling during the flipping process. When pressing the paper, the unfolding mechanism will first stretch the paper, flatten the wrinkles on the paper and then press it, further improving the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front three-dimensional structure schematic diagram of the present invention.

[0019] Figure 2 It is a side sectional structure schematic diagram of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the top section of the present invention.

[0021] Figure 4 It is a side sectional structure schematic diagram of the present invention.

[0022] Figure 5 It is in the present invention Figure 4 The enlarged schematic diagram of the structure at B.

[0023] Note: In the translation of , there is an unclear expression "传动连接" in the original Chinese. I have translated it as "传动连接" for now, but it may need to be adjusted according to the actual correct term. Figure 6 This is a schematic structural diagram of the cross-section of the gear ring in the present invention.

[0024] Figure 7 This is a schematic structural diagram of the adjusting mechanism in the present invention.

[0025] Figure 8 This is a schematic cross-sectional structural diagram of the driving mechanism in the present invention.

[0026] Fig. 9 In the present invention Figure 8 This is a schematic structural diagram of the structure at position C.

[0027] Fig.10 In the present invention Figure 8 This is a schematic structural diagram of the structure at position D.

[0028] Fig.11 This is a schematic structural diagram of the pushing assembly in the present invention.

[0029] Fig.12 In the present invention Figure 3 This is a schematic structural diagram of the structure at position A.

[0030] Fig.13 This is a schematic cross-sectional structural diagram of the pressing mechanism in the present invention.

[0031] Fig.14 This is a schematic side view structural diagram of the pressing mechanism in the present invention.

[0032] Fig.15 This is a schematic top view sectional structural diagram of the receiving plate in the present invention.

[0033] Fig.16 This is a schematic structural diagram of the unfolding mechanism in the present invention.

[0034] Fig.17 This is a schematic cross-sectional structural diagram of the middle part of the C-shaped rod in the present invention.

[0035] Fig.18 This is a schematic structural diagram of the lifting block in the present invention.

[0036] In the figure: 1, housing; 2, discharge port; 3, paper storage box; 4, first driving device; 5, first printing base; 6, transmission block; 7, support rod; 8, first limit block; 81, second limit block; 9, printing assembly; 10, conveyor belt; 11, telescopic rod; 12, receiving plate; 13, connecting pipe; 14, hollow column; 15, rack; 16, pull rope assembly; 17, first L plate; 171, fourth spring; 18, push plate; 19, pressure plate; 20, Gear ring; 21. L-rod; 22. T-block; 23. Drive wheel; 24. Square rod; 25. Cylindrical rod; 26. Blocking assembly; 27. Piston; 271. Sixth spring; 272. Fixed column; 273. Third spring; 28. Second L-plate; 29. ​​Pushing assembly; 291. Baffle; 30. Scraper; 31. Connecting slider; 311. Second spring; 32. Oblique block; 33. Oblique groove; 34. Connecting shaft; 35. Lifting block; 36. T-rod. DETAILED DESCRIPTION

[0037] See also Figure 1-4 In an embodiment of the present invention, a double-sided printing device includes a shell 1 and a paper storage box 3, a support rod 7 is symmetrically arranged inside the shell 1, two groups of T-shaped blocks 22 are correspondingly slidably arranged on the support rod 7, and the opposite ends of the two groups of T-shaped blocks 22 are rotatably matched with square rods 24, an adjustment mechanism is arranged on the square rod 24, and a receiving plate 12 is rotatably connected to the square rod 24 through the adjustment mechanism, a rotating mechanism for driving the square rod 24 to flip is arranged on the support rod 7, and a first driving device 4 for driving the T-shaped block 22 to slide relative to the support rod 7 is arranged on the end of the support rod 7, a feed port and a discharge port 2 are arranged at the opposite ends of the shell 1, and the paper storage box 3 is arranged at the end of the feed port of the shell 1, a conveying mechanism is arranged in the shell 1 near the discharge port 2 and below the receiving plate 12, and a printing component 9 is arranged on the top of the inner side wall of the shell 1 corresponding to the receiving plate 12. The conveying mechanism includes a first printing base 5 and a conveyor belt 10; the inner side walls of the conveyor belt 10 are transmission-connected with a rotating shaft at both ends, and a motor for driving the rotating shaft to rotate is provided at one end of the rotating shaft. The first printing base 5 is arranged in the conveyor belt 10 and both ends are fixedly connected to the support rod 7. The first printing base 5 is used to support the conveyor belt 10, and both ends of the rotating shaft are rotatably connected to the support rod 7. The output end of the first driving device 4 is fixedly connected to the T-block 22.

[0038] During specific use, before printing is started, the receiving plate 12 should be located near the paper storage box 3. When printing is required, the paper is placed in the paper storage box 3, and the paper storage box 3 transports the paper to the receiving plate 12 in the outer shell 1 (the paper storage box 3 is a prior art and will not be described in detail here). The printing component 9 includes a printing plate at the bottom for printing paper and a driving device that can drive the printing plate to rise and fall, and an ink box at the top for providing ink to the printing plate (the printing component 9 is a prior art and will not be described in detail here). Subsequently, the first driving device 4 starts to push the T-shaped block 22 to move in the direction of the discharge port 2, so that the square rod 24 moves with the cylindrical rod 25. Finally, the receiving plate 12 will be between the conveying mechanism and the printing component 9, and the printing component 9 can then print the paper on the receiving plate 12. Perform front printing. After the front printing is completed, the receiving plate 12 is moved relative to the paper storage box 3 through the cooperation of the first driving device 4, the T-shaped block 22 and the square rod 24. In this process, the receiving plate 12 is rotated half a circle and then flipped half a circle through the rotating mechanism and the adjusting mechanism. Then the first driving device 4 moves the receiving plate 12 between the printing component 9 and the conveying mechanism. At this time, the paper on the receiving plate 12 will fall on the conveyor belt 10. Then the first driving device 4 drives the receiving plate 12 to move relative to the paper storage box 3 to leave between the printing component 9 and the conveyor belt 10, and then the printing component 9 continues to print on the back of the paper. After printing, the motor starts and drives the conveyor belt 10 to rotate through the rotating shaft to convey the printed paper from the position of the discharge port 2 to the next step.

[0039] like Figure 4-6 , Figure 8 , Fig.10 As shown, the rotating mechanism includes a rack 15; the rack 15 is fixedly connected to the side wall of the support rod 7 away from the square rod 24, and two groups of cylindrical rods 25 are fixedly connected at both ends of the square rod 24. A gear ring 20 is arranged on the periphery of one group of cylindrical rods 25, and the gear ring 20 is meshed with the rack 15. The gear ring 20 is rotatably connected to the side wall of the square rod 24 close to the square rod 24, and the L rod 21 is slidably embedded in the top of the T-shaped block 22. The end of the L rod 21 away from the T-shaped block 22 is slidably matched with a first limit block 8 and a second limit block 81. The first limit block 8 is arranged on the support rod 7 at a position close to the first driving device 4, and the second limit block 81 is arranged on the support rod 7 at a position close to the printing component 9, and the first limit block 8 and the second limit block 81 are arranged opposite to each other, and the inner ring side wall of the gear ring 20 is provided with a protruding portion that slides and fits the inner wall of the cylindrical rod 25, and a blocking component 26 is arranged in the protruding portion.

[0040] It should be noted that the rack 15 is fixedly arranged on the same side of the support rod 7 and the gear ring 20. The support rod 7 structure is a cross bar and a vertical bar fixedly connected to the cross bar. The first limit block 8 and the second limit block 81 are respectively arranged on the vertical bar of the support rod 7. Opposite limit grooves are provided on the first limit block 8 and the second limit block 81. When the gear ring 20 moves from the first limit block 8 to the second limit block 81, the cooperation between the L rod 21 and the first limit block 8 makes it impossible for the gear ring 20 to mesh with the rack 15. When the gear ring 20 moves from the second limit block 81 to the first limit block 8, the cooperation between the L rod 21 and the second limit block 81 makes it possible for the gear ring 20 to mesh with the rack 15 and drive the cylindrical rod 25 to rotate half a circle.

[0041] Further, such as Figure 6 , Fig.10 As shown, the blocking assembly 26 includes a blocking protrusion and a first spring; the blocking protrusion is slidably embedded in the side wall of the protruding part of the gear ring 20 and is symmetrically arranged along its center line. The first spring is arranged between the two blocking protrusions. Under the action of the first spring, the blocking protrusion extends out of the side wall of the protruding part of the gear ring 20 and abuts against the side wall of the cylindrical rod 25, thereby increasing the friction between the gear ring 20 and the inner wall of the cylindrical rod 25, so that the position of the gear ring 20 is not easily shifted after being pushed by the L rod 21.

[0042] Furthermore, if Figure 7-9 As shown, the adjustment mechanism includes a transmission wheel 23; the transmission wheel 23 is rotatably arranged at the bottom of the square rod 24, and a hollow column 14 is rotatably arranged at the center of the square rod 24. The hollow column 14 is coaxially connected to the receiving plate 12, and the transmission wheel 23 and the hollow column 14 are connected through a belt transmission. A transmission block 6 that cooperates with the transmission wheel 23 is arranged on the side of the support rod 7 opposite to the square rod 24. When the transmission wheel 23 moves relative to the paper storage box 3, it will engage with the transmission block 6, and the receiving plate 12 is driven to rotate half a circle through the hollow column 14. A clamping mechanism for clamping and clamping the paper on the receiving plate 12 is arranged on the receiving plate 12 to prevent the paper from falling during the flipping process of the receiving plate 12.

[0043] It should be noted that you can refer to Figure 3-4When the square rod 24 moves from the paper storage box 3 to the direction of the discharge port 2, the gear ring 20 does not mesh with the rack 15. At this time, the transmission wheel 23 will mesh with the transmission block 6 for transmission, and the receiving plate 12 will rotate half a circle through the hollow column 14. When the square rod 24 moves from the discharge port 2 to the direction of the paper storage box 3, the transmission wheel 23 will mesh with the transmission block 6, causing the receiving plate 12 to rotate half a circle. Then the gear ring 20 meshes with the rack 15 to drive the square rod 24 and the receiving plate 12 to flip half a circle. Then, when the square rod 24 moves in the direction of the discharge port 2, the gear ring 20 does not mesh with the rack 15 first, and since the square rod 24 has flipped half a circle, the transmission wheel 23 also flips half a circle with the square rod 24. At this time, the transmission wheel 23 should be above the transmission block 6. Therefore, when the square rod 24 moves in the direction of the discharge port 2, the transmission wheel 23 and the transmission block 6 are not at the same level, so the two will not mesh.

[0044] When in use, before printing, the receiving plate 12 is close to the position of the paper storage box 3, and the L rod 21 cooperates with the first limit block 8; when printing, the first driving device 4 is started to push the T-shaped block 22 to move in the direction of the second limit block 81, and the movement of the T-shaped block 22 drives the cylindrical rod 25 to move, and the movement of the cylindrical rod 25 drives the gear ring 20 and the square rod 24 to move, and finally drives the receiving plate 12 to move, and the pressing mechanism will be driven to press the paper to prevent the paper from deviating or falling during the rotation and flipping of the receiving plate 12. When the stop block 81 moves, the toothed ring 20 cannot mesh with the rack 15, because in the initial state, the L rod 21 cooperates with the limiting groove on the first limiting block 8, so that the L rod 21 slides on the cylindrical rod 25 in the direction away from the first limiting block 8, and the end of the L rod 21 is fixedly connected to the toothed ring 20, so the movement of the L rod 21 causes the toothed ring 20 to slide on the cylindrical rod 25 in the direction away from the first limiting block 8 at the same time, thereby being staggered and no longer parallel to the rack 15. Under the action of the blocking component 26, the L rod 21 is not easy to move after it moves, so when the T-shaped block 22 moves to the second limiting block When the block 81 slides, the gear ring 20 will not be in meshing state with the rack 15, so that it cannot drive the receiving plate 12 to flip, and the transmission wheel 23 will be in meshing state with the transmission block 6, so that the transmission wheel 23 rotates half a circle, and the rotation of the transmission wheel 23 drives the hollow column 14 to rotate, and the rotation of the hollow column 14 causes the receiving plate 12 to rotate half a circle. When the L rod 21 moves to the position of the second limit block 81, and under the action of the second limit block 81, the L rod 21 slides relative to the receiving plate 12, so that the gear ring 20 slides on the cylindrical rod 25 relative to the receiving plate 12, so that After sliding, the gear ring 20 is parallel to the rack 15, so when the T-shaped block 22 moves from the second limit block 81 to the first limit block 8, the transmission wheel 23 first engages with the transmission block 6 to drive the transmission wheel 23 to rotate, and the receiving plate 12 rotates half a circle through the hollow column 14, and then the gear ring 20 engages with the rack 15 to drive the gear ring 20 to rotate half a circle, thereby driving the cylindrical rod 25 to rotate, and driving the receiving plate 12 to flip through the square rod 24, so as to avoid the problem of direction after flipping, resulting in the reverse printing being inconsistent with the front printing direction after the flipping, causing poor viewing for people.

[0045] like Figure 7-8 , Figure 13-15As shown, the clamping mechanism includes a telescopic rod 11; a first air channel is opened along the diagonal line in the receiving plate 12, and the telescopic rod 11 is slidably embedded in the first air channel, and the end of the telescopic rod 11 away from the receiving plate 12 is fixedly connected to a second L plate 28, and the second L plate 28 is opened on the side wall close to the telescopic rod 11. A sliding groove is slidably arranged in the sliding groove. A connecting slider 31 is slidably arranged in the sliding groove, and a pressing plate 19 is fixedly connected to the top of the connecting slider 31. A second spring 311 is arranged between the bottom of the connecting slider 31 and the bottom of the sliding groove, and an oblique block 32 is fixedly connected to the middle part of the side wall of the connecting slider 31 close to the telescopic rod 11. An oblique groove 33 that slidably cooperates with the oblique block 32 is opened on the side wall of the receiving plate 12, and an unfolding mechanism that cooperates with the pressing plate 19 for stretching paper is arranged on the top of the receiving plate 12. A driving mechanism for driving the telescopic rod 11 is arranged in the center of the receiving plate 12 and is connected to the first air channel; the telescopic rod A strip groove is provided on the top of 11, and a strip block is slidably fitted in the strip groove, and the top of the strip block is fixedly connected to the top of the airway; the driving mechanism includes a connecting pipe 13 and a pushing assembly 29; a second airway is provided at one end of the square rod 24 away from the transmission wheel 23, and a piston 27 is slidably embedded in the second airway, the first airway and the second airway are connected through the connecting pipe 13, and one end of another group of T-shaped blocks 22 away from the square rod 24 is fixedly connected to a pull rope assembly 16 for driving the piston 27 to move relative to the other group of T-shaped blocks 22, and a fixed column 272 is slidably embedded in the side wall of the piston 27, and the pushing assembly 29 is arranged at the end of the square rod 24 close to the T-shaped block 22 and on the side of the square rod 24 close to the first driving device 4, and one end of the fixed column 272 close to the pushing assembly 29 extends into the square rod 24, and a third spring 273 is arranged between the end of the fixed column 272 away from the pushing assembly 29 and the piston 27.

[0046] It should be noted that there are two groups of T-shaped blocks 22, one group is provided with a rotating mechanism, and the other group is provided with a pull rope assembly 16.

[0047] Further, such as Figure 8-9 As shown, the pull rope assembly 16 includes a pull rope and a winding roller; the end of the T-shaped block 22 away from the square rod 24 is fixedly connected to the support plate, the winding roller is rotatably arranged on the T-shaped block 22 through the support plate, the pull rope is wound around the winding roller, and the end of the pull rope away from the winding roller is rotatably connected to the end of the piston 27, and the sixth spring 271 is arranged between the end of the piston 27 close to the pull rope assembly 16 and the second air channel; specifically, as shown in FIG. Figure 11-12 As shown, the pushing assembly 29 includes a transverse plate and a limiting column; the limiting column is fixedly connected to the side wall of the square rod 24, the transverse plate is slidably mounted on the limiting column, and a top column extending into the side wall of the square rod 24 and slidingly cooperating with the fixed column 272 is arranged on the transverse plate near the center of the side wall of the square rod 24, and a baffle 291 cooperating with the transverse plate is arranged on the side of the square rod 24 opposite to the pushing assembly 29, and the end of the baffle 291 is fixedly connected to the support rod 7.

[0048] It should be noted that, as Figure 3-4 shown, on the inner side wall of the outer shell 1 corresponding to the drawstring assembly 16, there is a long block for meshing with the winding roller, and the long block is arranged at a position on the inner wall of the outer shell 1 close to the first driving device 4. When the drawstring assembly 16 moves relative to the discharge port 2, the winding roller meshes with the long block and rotates to drive the wound drawstring to drive the piston 27 to move in the direction relative to the winding roller, and the fixed column 272 and the third spring 273 in the piston 27 cooperate to extend into the side wall of the square rod 24 to limit the position of the piston 27.

[0049] Furthermore, as Figure 4 、 Figure 16-18 shown, the unfolding mechanism includes a first L-shaped plate 17 and a pushing plate 18; the first L-shaped plate 17 and the pushing plate 18 are sequentially arranged around the top of the receiving plate 12. The end of the pushing plate 18 is provided with a circular connecting rod that slidably cooperates with the inner wall of the first L-shaped plate 17. A fourth spring 171 is arranged between the circular connecting rods in the first L-shaped plate 17. The two ends of the first L-shaped plate 17 are rotatably connected with a connecting shaft 34. A U-shaped rod 36 is fixedly connected to the connecting shaft 34. A scraping plate 30 is slidably embedded in the center of the U-shaped rod 36. A lifting block 35 is slidably embedded in the side wall of the U-shaped rod 36 and the lifting block 35 penetrates through the scraping plate 30. A fifth spring is arranged between the top of the scraping plate 30 and the U-shaped rod 36. The end of the pushing plate 18 meshes with the connecting shaft 34, and the pushing plate 18 is slidably arranged on the top of the receiving plate 12.

[0050] During specific use, the specific shape of the lifting block 35 is preferably referred to Fig.18; When no printing is carried out, the third spring 273 is a compression spring, the telescopic rod 11 extends out of the bearing plate 12, the C-shaped rod 36 contracts in the first L-shaped plate 17, the piston 27 is at a position close to the connecting pipe 13 in the second air passage, the pressing plate 19 is far away from the second L-shaped plate 28 under the action of the second spring 311, and the extending direction of the inclined block 32 corresponds to the opening of the inclined groove 33;When printing, the paper enters from the paper storage box 3 onto the receiving plate 12. Subsequently, the first driving device 4 is activated, and through the cooperation of the T-shaped block 22, the square rod 24, and the cylindrical rod 25, the receiving plate 12 moves towards the printing assembly 9. During this process, the winding roller in the rope pulling assembly 16 meshes with the long square block and rotates to wind the rope. Through the rope, the piston 27 is moved in a direction away from the connecting pipe 13, and the sixth spring 271 is compressed under force. When the piston 27 moves to the position corresponding to the pushing assembly 29, the third spring 273 pushes the fixed column 272 to move towards the pushing assembly 29 and extend into the side wall of the square rod 24 to limit the positions of the piston 27 and the square rod 24. Because the position of the piston 27 is limited, when the winding roller in the rope pulling assembly 16 meshes with the long square block again and rotates due to the reverse movement of the T-shaped block 22, although the rope is unwound, the piston 27 cannot move at this time. Additionally, the movement of the piston 27 causes a negative pressure in the second air passage. Since the first air passage and the second air passage are connected, when there is a pressure difference between the air passage and the external atmospheric pressure, the telescopic rod 11 will slide relative to the connecting pipe 13 under the action of the negative pressure, causing the second L-shaped plate 28 to move towards the receiving plate 12, thereby enabling the inclined block 32 to slide in cooperation with the inclined groove 33. Since the top of the inclined groove 33 has a structure that slopes downward, when the inclined block 32 and the inclined groove 33 cooperate, the inclined block 32 will slide downward, causing the connecting slider 31 to move downward in the chute, thereby causing the pressing plate 19 to move downward to complete the pressing of the paper, and the second spring 311 is compressed. When the pressing plate 19 moves towards the receiving plate 12 with the second L-shaped plate 28, the pressing plate 19 simultaneously slides in cooperation with the pushing plate 18. The pressing plate 19 pushes the pushing plate 18 to move towards the first L-shaped plate 17. The movement of the pushing plate 18 causes the meshing connecting shaft 34 to rotate. The rotation of the connecting shaft 34 causes the U-shaped rod 36 to rotate and open with the connecting shaft 34 as the axis. Because in the initial state, the U-shaped rod 36 is retracted in the first L-shaped plate 17, at one end of the lifting block 35 close to the first L-shaped plate 17, it cooperates with the first L-shaped plate 17, causing the scraping plate 30 to move to the lowest point on the lifting block 35 at this time. At the same time, under the push of the fifth spring, the scraping plate 30 extends out of the U-shaped rod 36. Therefore, when the U-shaped rod 36 rotates, the scraping plate 30 is in full contact with the paper on the receiving plate 12 and unfolds the paper during rotation, preventing the paper from wrinkling due to external factors and affecting the printing effect. When the pressing plate 19 presses the paper tightly, the U-shaped rod 36 rotates half a turn and is parallel to the pushing plate 18, and the lifting block 35 will first contact and be抵住 by the pushing plate 18. As the U-shaped rod 36 continues to rotate, the lifting block 35 will slide relative to the U-shaped rod 36. The lifting block 35 slides in cooperation with the scraping plate 30 through the inclined surface, causing the scraping plate 30 to move upward and retract into the U-shaped rod 36, and the fifth spring is compressed at this time;After the front side of the paper is printed, the receiving plate 12 is simultaneously flipped and adjusted to move to the corresponding position of the conveyor belt 10. First, the baffle 291 is slidably engaged with the cross plate in the pushing component 29, squeezing the cross plate to move in the direction of the piston 27, causing the ejector pin to move in the direction of the piston 27, so that the fixed column 272 moves into the piston 27 and contracts within the piston 27, and the third spring 273 is compressed. When the fixed column 272 leaves the side wall of the square rod 24, the sixth spring 271 resets and pushes the piston 27 to move in the direction of the connecting pipe 13. The movement of the piston 27 drags the pull rope to unwind on the winding roller. Under the action of the air pressure difference, the telescopic rod 11 will move out of the receiving plate 12, so that the pressing plate 19 is driven by the second L-shaped plate 28 to move away from the receiving plate 12. When the inclined block 32 and the inclined groove 33 are separated, the second spring 311 resets and pushes the pressing plate 19 to move upward, releasing the pressing on the paper. At the same time, under the reset of the fourth spring 171, the pushing plate 18 is pushed to move relative to the pressing plate 19 through the circular connecting rod, so that the connecting shaft 34 rotates into the first L-shaped plate 17. Since the scraping plate 30 is contracted in the C-shaped rod 36, it will not contact the edge of the paper during rotation. At this time, due to the small distance between the flipped receiving plate 12 and the conveyor belt 10, the paper will fall on the conveyor belt 10 under the action of gravity. After starting the first driving device 4 to make the receiving plate 12 slide to the storage paper box 3 and return to the initial state, the printing component 9 prints the reverse side of the paper again. After printing, the paper is conveyed out of the outlet 2 through the conveyor belt 10.;

Claims

1. A double-sided printing device, comprising a housing and a paper storage box, characterized in that: The shell is symmetrically provided with support rods inside, two groups of T-shaped blocks are correspondingly slidably provided on the support rods, the opposite ends of the two groups of T-shaped blocks are rotatably matched with square rods, an adjustment mechanism is provided on the square rod, a receiving plate is rotatably connected to the square rod through the adjustment mechanism, a rotation mechanism for driving the square rod to flip is provided on the support rod, a first driving device for driving the T-shaped block to slide relative to the support rod is provided at the end of the support rod, a feed port and a discharge port are provided at the opposite ends of the shell, and the paper storage box is provided at the end of the feed port of the shell, A conveying mechanism is arranged in the shell near the discharge port and below the receiving plate, a printing assembly is arranged above the receiving plate at the top of the inner side wall of the shell, and the rotating mechanism includes a rack; the rack is fixedly connected to the side wall of the support rod away from the square rod, two groups of cylindrical rods are fixedly connected at both ends of the square rod, a gear ring is arranged on the periphery of one group of cylindrical rods, the gear ring and the rack are meshed, the gear ring is rotatably connected to the side wall of the square rod close to the square rod, the L rod is slidably embedded in the top of the T-shaped block, and the end of the L rod away from the T-shaped block is slidably engaged with the first A limit block and a second limit block, the first limit block is arranged on the support rod at a position close to the first driving device, the second limit block is arranged on the support rod at a position close to the printing component, and the first limit block and the second limit block are arranged opposite to each other, the side wall of the inner ring of the gear ring is provided with a protruding portion that is slidably adapted to the inner wall of the cylindrical rod, and a blocking component is arranged in the protruding portion; the blocking component includes a blocking protrusion and a first spring; the blocking protrusion is slidably embedded in the side wall of the protruding portion of the gear ring and is symmetrically arranged along its center line, and the first spring is arranged Between the two blocking protrusions; the adjustment mechanism includes a transmission wheel; the transmission wheel is rotatably arranged at the bottom of the square rod, and the center of the square rod is rotatably arranged with a hollow column, the hollow column is coaxially connected to the receiving plate, the transmission wheel and the hollow column are connected through a belt transmission, and a transmission block matching the transmission wheel is arranged on the side of the support rod opposite to the square rod, when the transmission wheel moves relative to the paper storage box, it will engage with the transmission block, and drive the receiving plate to rotate half a circle through the hollow column, and a clamping mechanism for clamping and clamping the paper on the receiving plate is arranged on the receiving plate.

2. A double-sided printing device according to claim 1, characterized in that: The clamping mechanism includes a telescopic rod; a first air channel is opened along the diagonal line in the receiving plate, the telescopic rod is slidably embedded in the first air channel, the end of the telescopic rod away from the receiving plate is fixedly connected to a second L-plate, the second L-plate is opened on the side wall close to the telescopic rod, a connecting slider is slidably arranged in the slide groove, the top of the connecting slider is fixedly connected to a pressure plate, a second spring is arranged between the bottom of the connecting slider and the bottom of the slide groove, the connecting slider is fixedly connected to an oblique block at the middle of the side wall close to the telescopic rod, the side wall of the receiving plate is opened with an oblique groove slidably matched with the oblique block, the top of the receiving plate is provided with an unfolding mechanism matched with the pressure plate for stretching paper, and the center of the receiving plate is provided with a driving mechanism for driving the telescopic rod and is connected to the first air channel.

3. A double-sided printing device according to claim 2, characterized in that: The driving mechanism includes a connecting pipe and a pushing component; a second air passage is opened at one end of the square rod away from the transmission wheel, a piston is slidably embedded in the second air passage, the first air passage and the second air passage are connected through the connecting pipe, and a pulling rope component for driving the piston to move relative to the other T-shaped block is fixedly connected to one end of the other group of T-shaped blocks away from the square rod. A fixed column is slidably embedded in the side wall of the piston, the pushing component is arranged at the end of the square rod close to the T-shaped block and on the side of the square rod close to the first driving device, one end of the fixed column close to the pushing component extends into the square rod, and a third spring is arranged between the end of the fixed column away from the pushing component and the piston.

4. A double-sided printing device according to claim 3, characterized in that: The pulling rope component includes a pulling rope and a winding roller; a support plate is fixedly connected to one end of the T-shaped block away from the square rod, the winding roller is rotatably arranged on the T-shaped block through the support plate, the pulling rope is wound on the winding roller, one end of the pulling rope away from the winding roller is rotatably connected to the end of the piston, and a sixth spring is arranged between the end of the piston close to the pulling rope component and the second air passage.

5. A double-sided printing device according to claim 3, characterized in that: The pushing component includes a cross plate and a limiting column; the limiting column is fixedly connected to the side wall of the square rod, the cross plate is slidably sleeved on the limiting column, a top column that extends into the side wall of the square rod and is slidably matched with the fixed column is arranged at the center of the side wall of the cross plate close to the square rod, a baffle plate that cooperates with the cross plate is arranged on the side of the square rod opposite to the pushing component, and the end of the baffle plate is fixedly connected to the support rod.

6. A double-sided printing device according to claim 2, characterized in that: The unfolding mechanism includes a first L-shaped plate and a pushing plate; the first L-shaped plate and the pushing plate are sequentially arranged around the top of the receiving plate. A circular connecting rod that is slidably matched with the inner wall of the first L-shaped plate is arranged at the end of the pushing plate. A fourth spring is arranged between the circular connecting rods in the first L-shaped plate. Connecting shafts are rotatably connected to both ends of the first L-shaped plate. A C-shaped rod is fixedly connected to the connecting shaft. A scraping plate is slidably embedded in the center of the C-shaped rod. A lifting block is slidably embedded in the side wall of the C-shaped rod and the lifting block penetrates through the scraping plate. A fifth spring is arranged between the top of the scraping plate and the C-shaped rod. The end of the pushing plate is meshed with the connecting shaft, and the pushing plate is slidably arranged on the top of the receiving plate.

7. A double-sided printing device according to claim 1, characterized in that: The conveying mechanism includes a first printing base and a conveyor belt; rotating shafts are传动连接 to both ends of the inner side wall of the conveyor belt, a motor is arranged at one end of the rotating shaft, the first printing base is arranged inside the conveyor belt and fixedly connected to the support rods at both ends, the two ends of the rotating shaft are rotatably connected to the support rods, and the output end of the first driving device is fixedly connected to the T-shaped block.

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